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100 votes
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Can HIV be transmitted via mosquitos?

No, this is not possible. There are a few reasons for that, but most important are that the only thing a mosquito injects is its own saliva, while the blood is sucked into the stomach where it is ...
Chris's user avatar
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54 votes

What is the benefit of fever during infections?

Fever is a trait observed in warm and cold-blooded vertebrates that has been conserved for hundreds of millions of years (Evans, 2015). Elevated body temperature stimulates the body's immune ...
AliceD's user avatar
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43 votes
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Why do diseases in the tap water of developing countries affect people from developed countries more?

You can expect that someone drinking from a water source regularly will develop immunity to the pathogens in that water source by being repeatedly exposed to them. However, it's not quite right to say ...
Bryan Krause's user avatar
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36 votes
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Specific mechanism behind lethality of yellow coat color in mice

Really interesting question: The lethal yellow mutation (also abbreviated Ay) affects the agouti signalling protein which plays a major role in pigmentation. Heterozygous expression of it leads to the ...
Chris's user avatar
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18 votes

Why doesn't blood remain on a mosquito's proboscis in quantities that could spread blood-borne diseases?

A mosquito's proboscis isn't like that of a butterfly, which could easily have nectar clinging to it when it is coiled up; instead, consider that the part of the mosquito's proboscis that enters a ...
anongoodnurse's user avatar
18 votes
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Is COVID-19 claimed to get less deadly over time? If so, why?

While the data are much too sparse and noisy to give an answer about what is happening to COVID-19's virulence (the technical term for the "deadliness" of an infectious disease), or to forecast what ...
Ben Bolker's user avatar
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15 votes
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Can cancers caused due to viruses be contagious?

The question title and the question itself ask two slightly (but critically) different questions. Can cancers caused due to viruses be contagious? NO Are these oncoviruses infectious in nature? YES ...
iayork's user avatar
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14 votes
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Do colour-blind people see white?

It's definitely not white or grey generally, it's a mix of other colors, they often have low resolution of a particular color so that it's less visible rather than visible and grey. Here's a page ...
bandybabboon's user avatar
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13 votes

Can HIV be transmitted via mosquitos?

I am not a medical doctor but in my view this is within the realms of possibility. The probability has been estimated by Princeton at 1 in 10 million. This is per bite, assuming - I presume - that the ...
Marcus Junius Brutus's user avatar
12 votes

Can cancers caused due to viruses be contagious?

Yes, Oncoviruses are infectious in nature. A good example is the Human Papilloma Virus, which does not immediately cause cancer, but can cause precancerous lesions in infected regions including cervix,...
Chris's user avatar
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12 votes
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Does the recent concern over several papers about Aβ*56 call into question the association of Alzheimers Disease with any amyloyd beta oligomer forms?

Does the recent concern over several papers about Aβ*56 call into question the association of Alzheimers Disease with any amyloyd beta oligomer forms? From my understanding, no. alzforum.org has ...
Franck Dernoncourt's user avatar
11 votes

Why are men more susceptible to severe COVID-19?

Update -- In the time since this question was asked, two relevant articles have been published, one in Nature Reviews Immunology and one in medRxiv (note: medRxiv is a preprint server and is therefore ...
acvill's user avatar
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9 votes
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Why is the species-diversity of deadly parasites greatest in the tropics?

The diversity of parasites shows a gradient with increasing diversity from the poles to the equator. Several reasons have been brought forth to explain the latitude-dependency of parasite diversity: ...
AliceD's user avatar
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8 votes
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Why don't we build up an immunity to sore throat?

Short Answer It should be noted that there are many non-pathogenic causes of sore throat, and I would suspect that you are not always distinguishing these causes from actual illness. In most cases, ...
theforestecologist's user avatar
8 votes
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how the coronavirus was distinguished?

This is basic epidemiology. When medical professionals notice that a group of people with some characteristic in common, are being seen for a similar disease, they ask if there's a connection. In this ...
iayork's user avatar
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7 votes
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Why doesn't blood remain on a mosquito's proboscis in quantities that could spread blood-borne diseases?

What you're talking about is called mechanical transmission (at least in veterinary and medical circles; plant epidemiologists call it something different). There's a nice overview by Gray and ...
arboviral's user avatar
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7 votes
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What causes the range of severity of neurological deficits in Down's syndrome?

The symptoms of Down syndrome occur due to overexpression of genes present on the duplicated chromosome. If possessing an extra chromosome meant an equivalent change in gene expression, one would ...
Bryan Krause's user avatar
  • 45.7k
7 votes

What is the benefit of fever during infections?

Fever normally under hypothalamic heat center's control which stays at limbic system of brain . Hypothalamus sets its own set point 36.4-37.2 in healthy peoples by some molecules named exogenous and ...
sinankzlyr's user avatar
7 votes
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What is "multiple" myeloma?

J. Von Rustizky, a Russian pathologist working in the laboratory of Friedrich von Recklinghausen (1833–1910) in Strassburg in 1873, introduced the term “multiple myeloma.” At autopsy, a 47-year-old ...
Alan Boyd's user avatar
  • 22.8k
7 votes

Why does this plum/apricot hybrid look like brains?

It is difficult to say, but it is likely due to disease. Many plant diseases have the effect of convincing plant tissues that they are some other organ than what they actually are, which leads to ...
Maximilian Press's user avatar
7 votes

Longevity and extent of transfection after SARS-COV-2 vaccination with Janssen

Both the AstraZeneca (AZ) and Janssen (J) vaccines against SARS-CoV-2 work by using what is known as a viral vector to generate an immune response. In both cases these vaccines use an Adenovirus as ...
bob1's user avatar
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7 votes
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Can plants be pathogenic towards humans?

Yes: Protothecosis is infection of the bloodstream by a genus of non-green algae. There are also odd reports of infection by green algae, such as this one.
bob1's user avatar
  • 12.1k
6 votes

How to find mutations related to disease for a protein?

I think I understand what you are asking so I will make a little guide to find what you need: NOTE the mutations you are searching for are probably on gene level so you can search your protein on ...
KingBoomie's user avatar
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6 votes
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Can a human actually be "frightened to death?"

The people whom this happens to consider themselves average people. The thought is that catecholamine surge caused by the event triggers some predisposition to cardiac arrhythmia - maybe inherited, ...
Willk's user avatar
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6 votes

Why exactly does the immune system weaken with age?

We don't know. More precisely, we know of many, many different reasons why the immune system deteriorates with age, but we don't really know which are different measures of the same thing, which ...
iayork's user avatar
  • 14.2k
6 votes

Why does this plum/apricot hybrid look like brains?

This is a guess, but perhaps the result of an infection by a fungal plant pathogen related to Taphrina deformans. T deformans infects species of the genus Prunus (i.e. the genus of prunes and apricots)...
theforestecologist's user avatar
6 votes
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Is there any biosafety level scale for plant pathogens?

Plant pathogens are not a health hazard to the experimenters. However, they can pose health hazards to plants and cause damage to ecosystem. There are plant biosafety levels: BL1-P up to BL4-P (also ...
WYSIWYG's user avatar
  • 35.6k
6 votes

Is there a minimum load below which an infectious agent will not cause disease?

It depends on the pathogen, delivery method, environment, etc. In most cases, a single pathogen is not enough to cause disease -- it may need many millions or billions -- but there are some cases ...
iayork's user avatar
  • 14.2k
6 votes
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Why there aren't any pandemic diseases by prions?

I think that you could argue that some prion diseases do form epidemics or outbreaks. In some cases it does appear that people have referred to BSE/vCJD as pandemics. There is even some journalism on ...
Maximilian Press's user avatar
6 votes
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Is unihibited exhalation beneficial for someone with a contagious respiratory disease?

Short answer No, there isn't going to be any benefit to an infected person by allowing them to breathe out virus particles freely. The number of viral particles breathed out is tiny relative to the ...
Bryan Krause's user avatar
  • 45.7k

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